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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 42°F | 32°F | 3.7" |
| February | 25°F | 44°F | 34°F | 3.5" |
| March | 37°F | 58°F | 46°F | 5.2" |
| April | 46°F | 70°F | 57°F | 8.7" |
| May | 54°F | 77°F | 65°F | 6.1" |
| June | 63°F | 87°F | 74°F | 8.3" |
| July | 66°F | 89°F | 77°F | 8.1" |
| August | 64°F | 88°F | 75°F | 11.0" |
| September | 57°F | 81°F | 68°F | 5.5" |
| October | 45°F | 70°F | 56°F | 5.6" |
| November | 34°F | 56°F | 44°F | 7.5" |
| December | 28°F | 45°F | 36°F | 6.9" |
| Index | Ina | Illinois | National |
| Air quality index | 43 | 41 | 42 |
| Pollution index | 569,178 | 3,148,694 | 2,726,193 |
| Measurement | Total |
| Days measured | 344 |
| Days with good air quality | 269 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Woodlawn, IL | 555 | 43 | 14.0% |
| Mulkeytown, IL | 128 | 43 | 14.0% |
| Macedonia, IL | 41 | 43 | 14.0% |
| Valier, IL | 731 | 43 | 14.0% |
| Nason, IL | 221 | 43 | 14.0% |
| Ina, IL | 2,243 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Caldwell, OH | 2,243 | 35 | 30.0% |
| Jamestown, KY | 2,242 | 40 | 20.0% |
| Spring City, TN | 2,242 | 30 | 40.0% |
| Biggar, SK | 2,242 | n/a | |
| Augusta, AR | 2,244 | 45 | 10.0% |
| Ina, IL | 2,243 | 43 | 14.0% |
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